Bump spotbugs to 4.0 (#1577)
Bump spotbugs to 4.0 (#1577)

Newer spotbugs release uses newer version of asm, required for parsing
class files created with newer JDK versions. Spotbugs 4.0.0 supports at
least Java 13, possibly up to 15.
milleruntime/accumulo,mjwall/accumulo,ctubbsii/accumulo,milleruntime/accumulo,ivakegg/accumulo,apache/accumulo,ivakegg/accumulo,ctubbsii/accumulo,mjwall/accumulo,phrocker/accumulo-1,mjwall/accumulo,milleruntime/accumulo,mjwall/accumulo,apache/accumulo,ctubbsii/accumulo,ivakegg/accumulo,phrocker/accumulo-1,ctubbsii/accumulo,ivakegg/accumulo,mjwall/accumulo,mjwall/accumulo,phrocker/accumulo-1,phrocker/accumulo-1,ctubbsii/accumulo,ctubbsii/accumulo,phrocker/accumulo-1,milleruntime/accumulo,milleruntime/accumulo,mjwall/accumulo,apache/accumulo,ivakegg/accumulo,apache/accumulo,ctubbsii/accumulo,phrocker/accumulo-1,milleruntime/accumulo,phrocker/accumulo-1,apache/accumulo,ivakegg/accumulo,apache/accumulo,milleruntime/accumulo,apache/accumulo,ivakegg/accumulo